Nanocomposite of graphene and metal oxide materials
AssigneesBattelle Memorial Institute, The Trustees of Princeton University
InventorsJun Liu, Ilhan A. Aksay, Daiwon Choi, Donghai Wang, Zhenguo Yang
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Abstract
Nanocomposite materials comprising a metal oxide bonded to at least one graphene material. The nanocomposite materials exhibit a specific capacity of at least twice that of the metal oxide material without the graphene at a charge/discharge rate greater than about 10 C.
Claims15
A nanocomposite material comprising a metal oxide bonded directly to a graphene layer, wherein the graphene layer consists essentially of 1 to 147 graphene sheets, the nanocomposite material having a specific capacity at least twice that of the metal oxide without the graphene layer at a charge/discharge rate greater than about 10 C.
A method comprising:
- providing graphene layers in a first mixture, the graphene layers having a first surface and a second surface and thicknesses of 0.5 to 50 nm;
- dispersing the graphene layers with a surfactant;
- adding a metal oxide precursor to said dispersed graphene layers to form a second mixture;
- precipitating the metal oxide from the second mixture on surfaces of the dispersed graphene layers to form a nanocomposite material comprising a metal oxide bonded directly to the first and second surfaces of a graphene layer;
- and
- wherein the precipitating the metal oxide further comprises condensing the metal oxide at a temperature of less than 100° C. to form rutile crystalline metal oxide bonded directly to the first and second surfaces of the graphene layer.
Dependencies are inferred from the claim text.